<template>
  <div>

    <div style="margin:auto;height: 350px;width: 350px;">
      <h1 style="">门禁</h1>
      <video
        id="videoCamera"
        :width="videoWidth"
        :height="videoHeight"
        autoplay
      ></video>
      <canvas
        style="display: none"
        id="canvasCamera"
        :width="videoWidth"
        :height="videoHeight"
      ></canvas>
    </div>
<!--    <div v-if="imgSrc" class="img_bg_camera">-->
<!--      <p>效果预览</p>-->
<!--      <img :src="imgSrc" alt class="tx_img" />-->
<!--    </div>-->
    <div class="button">
      <el-button @click="getCompetence()" type="primary">打开摄像头</el-button>
<!--      <el-button @click="stopNavigator()" type="warning">关闭摄像头</el-button>-->
      <el-button @click="setImage()" type="success">拍照</el-button>
    </div>
    <div>
        <el-table :data="humanfaces" border style="width: 100%">
          <el-table-column prop="PersonId" label="手机号" width="180"></el-table-column>
          <el-table-column prop="PersonName" label="姓名" width="180"></el-table-column>
          <el-table-column prop="Gender" label="性别">
            <template slot-scope="scope">
              {{scope.row.Gender==1?'男':'女'}}
            </template>
          </el-table-column>
          <el-table-column prop="Score" label="匹配度" width="180"></el-table-column>
        </el-table>
    </div>
  </div>
</template>
<script>
import {SearchFace} from "@/api/system/face";

export default {
  data() {
    return {
      videoWidth: 350,
      videoHeight: 350,
      imgSrc: "",
      thisCancas: null,
      thisContext: null,
      thisVideo: null,
      openVideo: false,
      personnelss: [],
      humanfaces:[],
      faceform:{
        Image:null,
      }

    };
  },
  mounted() {
    this.getCompetence(); //进入页面就调用摄像头
  },
  methods: {
    // 调用权限（打开摄像头功能）
    getCompetence() {
      var _this = this;
      _this.thisCancas = document.getElementById("canvasCamera");
      _this.thisContext = this.thisCancas.getContext("2d");
      _this.thisVideo = document.getElementById("videoCamera");
      _this.thisVideo.style.display = "block";
      // 获取媒体属性，旧版本浏览器可能不支持mediaDevices，我们首先设置一个空对象
      if (navigator.mediaDevices === undefined) {
        navigator.mediaDevices = {};
      }
      // 一些浏览器实现了部分mediaDevices，我们不能只分配一个对象
      // 使用getUserMedia，因为它会覆盖现有的属性。
      // 这里，如果缺少getUserMedia属性，就添加它。
      if (navigator.mediaDevices.getUserMedia === undefined) {
        navigator.mediaDevices.getUserMedia = function (constraints) {
          // 首先获取现存的getUserMedia(如果存在)
          var getUserMedia =
            navigator.webkitGetUserMedia ||
            navigator.mozGetUserMedia ||
            navigator.getUserMedia;
          // 有些浏览器不支持，会返回错误信息
          // 保持接口一致
          if (!getUserMedia) {
            //不存在则报错
            return Promise.reject(
              new Error("getUserMedia is not implemented in this browser")
            );
          }
          // 否则，使用Promise将调用包装到旧的navigator.getUserMedia
          return new Promise(function (resolve, reject) {
            getUserMedia.call(navigator, constraints, resolve, reject);
          });
        };
      }
      var constraints = {
        audio: false,
        video: {
          width: this.videoWidth,
          height: this.videoHeight,
          transform: "scaleX(-1)",
        },
      };
      navigator.mediaDevices
        .getUserMedia(constraints)
        .then(function (stream) {
          // 旧的浏览器可能没有srcObject
          if ("srcObject" in _this.thisVideo) {
            _this.thisVideo.srcObject = stream;
          } else {
            // 避免在新的浏览器中使用它，因为它正在被弃用。
            _this.thisVideo.src = window.URL.createObjectURL(stream);
          }
          _this.thisVideo.onloadedmetadata = function (e) {
            _this.thisVideo.play();
          };
        })
        .catch((err) => {
          console.log(err);
        });
    },
    //  绘制图片（拍照功能）
    setImage() {
      var _this = this;
      // canvas画图
      _this.thisContext.drawImage(
        _this.thisVideo,
        0,
        0,
        _this.videoWidth,
        _this.videoHeight
      );
      // 获取图片base64链接
      var Image = this.thisCancas.toDataURL("image/png");
      // _this.imgSrc = Image; //赋值并预览图片
      this.faceform=Image;
      // console.log("-----------"+this.faceform)
      this.getList()
    },
    getList(){
      SearchFace(this.faceform).then(res=>{//传base64图片到后台
        let list = [];//定义一个空数组
        let unit =res;
        let obj = {};//定义一个空对象
        for (let key in unit) {
          obj[key] = unit[key];//key就是对象中的属性
        }
        list.push(obj)
        // console.log(res)
        this.humanfaces = list[0].Results[0].Candidates
        this.personnelss = list[0].Results[0].Candidates[0];//赋值给渲染列表数组
        // this.humanfaces=res
        console.log(this.personnelss)
        if(this.personnelss.Score>90){
          this.$message.success('欢迎您,尊贵的'+this.personnelss.PersonName);
          this.stopNavigator();
        }else {
          this.$message.info("您并非本小区住户！请联系管理人员")
        }
      }).catch(err=>{
        this.$message.error("人脸比对失败！请检查是否开启摄像头")
      })
    },
    // 关闭摄像头
    stopNavigator() {
      this.thisVideo.srcObject.getTracks()[0].stop();
    },
    // base64转文件，此处没用到
    dataURLtoFile(dataurl, filename) {
      var arr = dataurl.split(",");
      var mime = arr[0].match(/:(.*?);/)[1];
      var bstr = atob(arr[1]);
      var n = bstr.length;
      var u8arr = new Uint8Array(n);
      while (n--) {
        u8arr[n] = bstr.charCodeAt(n);
      }
      return new File([u8arr], filename, { type: mime });
    },
  },
};
</script>
<style scoped>
</style>
